<!DOCTYPE html>
<html lang="zh-CN">

<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
  <title>Bootstrap 101 Template</title>

  <!-- Bootstrap -->
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" rel="stylesheet">
  <link rel="stylesheet" href="./css/index.css">

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      <script src="https://cdn.jsdelivr.net/npm/html5shiv@3.7.3/dist/html5shiv.min.js"></script>
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    <![endif]-->
</head>

<body>
  <div class="blank_top"></div>
  <nav class="navbar navbar-default navbar-fixed-top"">
    <div class=" container-fluid">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse"
        data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">学习</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li class="active"><a href="#">Html <span class="sr-only">(current)</span></a></li>
        <li><a href="#">CSS</a></li>
        <li><a href="#">JavaScript</a></li>
        <li><a href="#">Vue</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true"
            aria-expanded="false">其他 <span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="#">面试</a></li>
            <li><a href="#">算法</a></li>
            <li><a href="#">心得体会</a></li>
            <li><a href="#">心得体会</a></li>
            <li><a href="#">心得体会</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">案例</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">其他想法</a></li>
          </ul>
        </li>
      </ul>
      <form class="navbar-form navbar-right">
        <div class="form-group">
          <input type="text" class="form-control" placeholder="Search">
        </div>
        <button type="submit" class="btn btn-default">Submit</button>
      </form>
    </div><!-- /.navbar-collapse -->
    </div><!-- /.container-fluid -->
  </nav>
  <div class="container">
    <!-- 页头 -->
    <div class="page-header">
      <h1>这是页头 <small><code>small</code>标签可以让文字变小</small></h1>
    </div>
    <!-- 巨幕 -->
    <div class="jumbotron">
      <h3>巨幕组件 需要包在<code>.container</code>标签内才能有居中效果</h3>
      <h3>否则只会撑满屏幕</h3>
      <h3>其他组件也一样，最好都放在<code>.container</code>标签里</h3>
      <h3>相当于有了版心了</h3>
      <hr>
      <p>文本对齐👇</p>
      <p class="text-left">Left aligned text. <code>.text-left</code> </p>
      <p class="text-center">Center aligned text. <code>.text-center</code> </p>
      <p class="text-right">Right aligned text. <code>.text-right</code> </p>
      <p class="text-justify">Justified text. <code>.text-justify</code> </p>
      <p class="text-nowrap">No wrap text. <code>.text-nowrap</code> </p>
      <hr>
      <br>
      <p><a class="btn btn-primary btn-lg" href="#" role="button">开始学习吧</a></p>
    </div>
    <!-- 列表组 -->
    <ul class="list-group">
      <li class="list-group-item">
        <code>q</code>标签作用是加引号————<q>来个引号</q>
      </li>
      <li class="list-group-item">
        <code>code</code>标签作用是显示代码块
      </li>
      <li class="list-group-item">
        <code>mark</code>标签作用是高亮标记文本————<mark>高亮</mark>
      </li>
      <li class="list-group-item">Porta ac consectetur ac</li>
      <li class="list-group-item">Vestibulum at eros</li>
    </ul>

    <!-- 标签 -->
    <h3>Example heading <span class="label label-default">New</span></h3>
    <h4>Example heading <span class="label label-default">New</span></h4>
    <h5>Example heading <span class="label label-default">New</span></h5>
    <h6>Example heading <span class="label label-default">New</span></h6>

    <!-- 表单 -->
    <form>
      <div class="form-group">
        <label for="exampleInputEmail1">Email address</label>
        <input type="email" class="form-control" id="exampleInputEmail1" placeholder="Email">
      </div>
      <div class="form-group">
        <label for="exampleInputPassword1">Password</label>
        <input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
      </div>
      <div class="form-group">
        <label for="exampleInputFile">File input</label>
        <input type="file" id="exampleInputFile">
        <p class="help-block">Example block-level help text here.</p>
      </div>
      <div class="checkbox">
        <label>
          <input type="checkbox"> Check me out
        </label>
      </div>
      <button type="submit" class="btn btn-default">Submit</button>
    </form>

    <!-- 表格 -->
    <table class="table table-striped table-bordered table-hover">
      <caption>Optional table caption.</caption>
      <thead>
        <tr>
          <th>#</th>
          <th>First Name</th>
          <th>Last Name</th>
          <th>Username</th>
        </tr>
      </thead>
      <tbody>
        <tr>
          <th scope="row">1</th>
          <td>Mark</td>
          <td>Otto</td>
          <td>@mdo</td>
        </tr>
        <tr>
          <th scope="row">2</th>
          <td>Jacob</td>
          <td>Thornton</td>
          <td>@fat</td>
        </tr>
        <tr>
          <th scope="row">3</th>
          <td>Larry</td>
          <td>the Bird</td>
          <td>@twitter</td>
        </tr>
      </tbody>
    </table>




  </div>



  <!-- jQuery (Bootstrap 的所有 JavaScript 插件都依赖 jQuery，所以必须放在前边) -->
  <script src="https://cdn.jsdelivr.net/npm/jquery@1.12.4/dist/jquery.min.js"></script>
  <!-- 加载 Bootstrap 的所有 JavaScript 插件。你也可以根据需要只加载单个插件。 -->
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/js/bootstrap.min.js"></script>
</body>

</html>